ChipFind - документация

Электронный компонент: SN74LS147D

Скачать:  PDF   ZIP
Semiconductor Components Industries, LLC, 1999
December, 1999 Rev. 6
1
Publication Order Number:
SN74LS147/D
SN74LS147 SN74LS148
10-Line-to-4-Line
and 8-Line-to-3-Line
Priority Encoders
The SN74LS147 and the SN74LS148 are Priority Encoders. They
provide priority decoding of the inputs to ensure that only the highest
order data line is encoded. Both devices have data inputs and outputs
which are active at the low logic level.
The LS147 encodes nine data lines to four-line (8-4-2-1) BCD. The
implied decimal zero condition does not require an input condition
because zero is encoded when all nine data lines are at a high logic
level.
The LS148 encodes eight data lines to three-line (4-2-1) binary
(octal). By providing cascading circuitry (Enable Input EI and Enable
Output EO) octal expansion is allowed without needing external
circuitry.
GUARANTEED OPERATING RANGES
Symbol
Parameter
Min
Typ
Max
Unit
V
CC
Supply Voltage
4.75
5.0
5.25
V
T
A
Operating Ambient
Temperature Range
0
25
70
C
I
OH
Output Current High
0.4
mA
I
OL
Output Current Low
8.0
mA
LOW
POWER
SCHOTTKY
Device
Package
Shipping
ORDERING INFORMATION
SN74LS147N
16 Pin DIP
2000 Units/Box
SN74LS147D
16 Pin
SOIC
D SUFFIX
CASE 751B
http://onsemi.com
2500/Tape & Reel
PLASTIC
N SUFFIX
CASE 648
16
1
16
1
SN74LS148N
16 Pin DIP
SN74LS148D
16 Pin
2000 Units/Box
2500/Tape & Reel
SN74LS147 SN74LS148
http://onsemi.com
2
SN74LS147
(TOP VIEW)
SN74LS148
(TOP VIEW)
4
5
6
7
8
C
B
GND
D
3
2
1
9
A
V
CC
NC
14
13
12
11
10
9
1
2
3
4
5
6
7
16
15
8
D
3
2
1
9
A
4
5
6
7
8
C
B
OUTPUT
INPUTS
OUTPUT
INPUTS
OUTPUTS
4
5
6
7
E1
A2
A1
GND
V
CC
EO
GS
3
2
1
0
A0
14
13
12
11
10
9
1
2
3
4
5
6
7
16
15
8
EO
GS
3
2
1
0
A0
4
5
6
7
EI
A2
A1
OUTPUTS
INPUTS
OUTPUT
INPUTS
OUTPUTS
SN74LS147 SN74LS148
http://onsemi.com
3
SN74LS147
FUNCTION TABLE
INPUTS
OUTPUTS
1
2
3
4
5
6
7
8
9
D
C
B
A
H
H
H
H
H
H
H
H
H
H
H
H
H
X
X
X
X
X
X
X
X
L
L
H
H
L
X
X
X
X
X
X
X
L
H
L
H
H
H
X
X
X
X
X
X
L
H
H
H
L
L
L
X
X
X
X
X
L
H
H
H
H
L
L
H
X
X
X
X
L
H
H
H
H
H
L
H
L
X
X
X
L
H
H
H
H
H
H
L
H
H
X
X
L
H
H
H
H
H
H
H
H
L
L
X
L
H
H
H
H
H
H
H
H
H
L
H
L
H
H
H
H
H
H
H
H
H
H
H
L
SN74LS148
FUNCTION TABLE
INPUTS
OUTPUTS
EI
0
1
2
3
4
5
6
7
A2
A1
A0
GS
EO
H
X
X
X
X
X
X
X
X
H
H
H
H
H
L
H
H
H
H
H
H
H
H
H
H
H
H
L
L
X
X
X
X
X
X
X
L
L
L
L
L
H
L
X
X
X
X
X
X
L
H
L
L
H
L
H
L
X
X
X
X
X
L
H
H
L
H
L
L
H
L
X
X
X
X
L
H
H
H
L
H
H
L
H
L
X
X
X
L
H
H
H
H
H
L
L
L
H
L
X
X
L
H
H
H
H
H
H
L
H
L
H
L
X
L
H
H
H
H
H
H
H
H
L
L
H
L
L
H
H
H
H
H
H
H
H
H
H
L
H
H = HIGH Logic Level, L = LOW Logic Level, X = Irrelevant
FUNCTIONAL BLOCK DIAGRAMS
SN74LS147
SN74LS148
1
2
3
4
5
6
7
8
9
(11)
(12)
(13)
(1)
(2)
(3)
(4)
(5)
(10)
(9)
(7)
(6)
(14)
A
B
C
D
0
1
2
3
4
5
6
7
EI
(10)
(11)
(12)
(13)
(1)
(2)
(3)
(4)
(5)
(15)
EO
(14)
GS
(8)
A0
(7)
A1
(6)
A2
SN74LS147 SN74LS148
http://onsemi.com
4
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE
(unless otherwise specified)
Limits
Symbol
Parameter
Min
Typ
Max
Unit
Test Conditions
V
IH
Input HIGH Voltage
2.0
V
Guaranteed Input HIGH Voltage for
All Inputs
V
IL
Input LOW Voltage
0.8
V
Guaranteed Input LOW Voltage for
All Inputs
V
IK
Input Clamp Diode Voltage
0.65
1.5
V
V
CC
= MIN, I
IN
= 18 mA
V
OH
Output HIGH Voltage
2.7
3.5
V
V
CC
= MIN, I
OH
= MAX, V
IN
= V
IH
or V
IL
per Truth Table
V
O
Output LOW Voltage
0.25
0.4
V
I
OL
= 4.0 mA
V
CC
= V
CC
MIN,
V
IN
= V
IL
or V
IH
V
OL
Output LOW Voltage
0.35
0.5
V
I
OL
= 8.0 mA
V
IN
= V
IL
or V
IH
per Truth Table
I
IH
Input HIGH Current
All Others
Inputs 1 7 (LS148)
20
40
A
V
CC
= MAX, V
IN
= 2.7 V
IH
All Others
Inputs 1 7 (LS148)
0.1
0.2
mA
V
CC
= MAX, V
IN
= 7.0 V
I
IL
Input LOW Current
All Others
Inputs 1 7 (LS148)
0.4
0.8
mA
V
CC
= MAX, V
IN
= 0.4 V
I
OS
Short Circuit Current (Note 1)
20
100
mA
V
CC
= MAX
I
CCH
Power Supply Current Output HIGH
17
mA
V
CC
= MAX, All Inputs = 4.5 V
I
CCL
Output LOW
20
mA
V
CC
= MAX, Inputs 7 & E1 = GND
All Other Inputs = 4.5 V
Note 1: Not more than one output should be shorted at a time, nor for more than 1 second.
SN74LS147 SN74LS148
http://onsemi.com
5
AC CHARACTERISTICS
(V
CC
= 5.0 V, T
A
= 25
C)
SN74LS147
From
To
Limits
Symbol
From
(Input)
To
(Output)
Waveform
Min
Typ
Max
Unit
Test Conditions
t
PLH
Any
Any
In-phase
12
18
ns
t
PHL
Any
Any
output
12
18
ns
C
L
= 15 pF,
t
PLH
Any
Any
Out-of-phase
21
33
ns
L
R
L
= 2.0 k
t
PHL
Any
Any
output
15
23
ns
SN74LS148
From
To
Limits
Symbol
From
(Input)
To
(Output)
Waveform
Min
Typ
Max
Unit
Test Conditions
t
PLH
1 thru 7
A0 A1 or A2
In-phase
14
18
ns
t
PHL
1 thru 7
A0, A1, or A2
output
15
25
ns
t
PLH
1 thru 7
A0 A1 or A2
Out-of-phase
20
36
ns
t
PHL
1 thru 7
A0, A1, or A2
output
16
29
ns
t
PLH
0 thru 7
EO
Out-of-phase
7.0
18
ns
t
PHL
0 thru 7
EO
output
25
40
ns
C
15 F
t
PLH
0 thru 7
GS
In-phase
35
55
ns
C
L
= 15 pF,
R
L
= 2.0 k
t
PHL
0 thru 7
GS
output
9.0
21
ns
R
L
2.0 k
t
PLH
EI
A0 A1 or A2
In-phase
16
25
ns
t
PHL
EI
A0, A1, or A2
output
12
25
ns
t
PLH
EI
GS
In-phase
12
17
ns
t
PHL
EI
GS
output
14
36
ns
t
PLH
In-phase
12
21
t
PHL
EI
EO
In- hase
output
28
30
40
45
ns
(LS148)
SN74LS147 SN74LS148
http://onsemi.com
6
PACKAGE DIMENSIONS
N SUFFIX
PLASTIC PACKAGE
CASE 64808
ISSUE R
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. DIMENSION L TO CENTER OF LEADS WHEN
FORMED PARALLEL.
4. DIMENSION B DOES NOT INCLUDE MOLD FLASH.
5. ROUNDED CORNERS OPTIONAL.
A
B
F
C
S
H
G
D
J
L
M
16 PL
SEATING
1
8
9
16
K
PLANE
T
M
A
M
0.25 (0.010)
T
DIM
MIN
MAX
MIN
MAX
MILLIMETERS
INCHES
A
0.740
0.770
18.80
19.55
B
0.250
0.270
6.35
6.85
C
0.145
0.175
3.69
4.44
D
0.015
0.021
0.39
0.53
F
0.040
0.70
1.02
1.77
G
0.100 BSC
2.54 BSC
H
0.050 BSC
1.27 BSC
J
0.008
0.015
0.21
0.38
K
0.110
0.130
2.80
3.30
L
0.295
0.305
7.50
7.74
M
0
10
0
10
S
0.020
0.040
0.51
1.01
_
_
_
_
SN74LS147 SN74LS148
http://onsemi.com
7
PACKAGE DIMENSIONS
D SUFFIX
PLASTIC SOIC PACKAGE
CASE 751B05
ISSUE J
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSIONS A AND B DO NOT INCLUDE
MOLD PROTRUSION.
4. MAXIMUM MOLD PROTRUSION 0.15 (0.006)
PER SIDE.
5. DIMENSION D DOES NOT INCLUDE DAMBAR
PROTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.127 (0.005) TOTAL
IN EXCESS OF THE D DIMENSION AT
MAXIMUM MATERIAL CONDITION.
1
8
16
9
SEATING
PLANE
F
J
M
R
X 45
_
G
8 PL
P
B
A
M
0.25 (0.010)
B
S
T
D
K
C
16 PL
S
B
M
0.25 (0.010)
A
S
T
DIM
MIN
MAX
MIN
MAX
INCHES
MILLIMETERS
A
9.80
10.00
0.386
0.393
B
3.80
4.00
0.150
0.157
C
1.35
1.75
0.054
0.068
D
0.35
0.49
0.014
0.019
F
0.40
1.25
0.016
0.049
G
1.27 BSC
0.050 BSC
J
0.19
0.25
0.008
0.009
K
0.10
0.25
0.004
0.009
M
0
7
0
7
P
5.80
6.20
0.229
0.244
R
0.25
0.50
0.010
0.019
_
_
_
_
SN74LS147 SN74LS148
http://onsemi.com
8
ON Semiconductor and are trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes
without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular
purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability,
including without limitation special, consequential or incidental damages. "Typical" parameters which may be provided in SCILLC data sheets and/or
specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including "Typicals" must be
validated for each customer application by customer's technical experts. SCILLC does not convey any license under its patent rights nor the rights of others.
SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications
intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or
death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold
SCILLC and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable
attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim
alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer.
PUBLICATION ORDERING INFORMATION
ASIA/PACIFIC: LDC for ON Semiconductor Asia Support
Phone:
3036752121 (TueFri 9:00am to 1:00pm, Hong Kong Time)
Toll Free from Hong Kong 80044223781
Email: ONlitasia@hibbertco.com
JAPAN: ON Semiconductor, Japan Customer Focus Center
4321 NishiGotanda, Shinagawaku, Tokyo, Japan 1418549
Phone: 81354878345
Email: r14153@onsemi.com
Fax Response Line:
3036752167
8003443810 Toll Free USA/Canada
ON Semiconductor Website: http://onsemi.com
For additional information, please contact your local
Sales Representative.
SN74LS147/D
North America Literature Fulfillment:
Literature Distribution Center for ON Semiconductor
P.O. Box 5163, Denver, Colorado 80217 USA
Phone: 3036752175 or 8003443860 Toll Free USA/Canada
Fax: 3036752176 or 8003443867 Toll Free USA/Canada
Email: ONlit@hibbertco.com
N. American Technical Support: 8002829855 Toll Free USA/Canada
EUROPE: LDC for ON Semiconductor European Support
German Phone: (+1) 3033087140 (MF 2:30pm to 5:00pm Munich Time)
Email: ONlitgerman@hibbertco.com
French Phone: (+1) 3033087141 (MF 2:30pm to 5:00pm Toulouse Time)
Email: ONlitfrench@hibbertco.com
English Phone: (+1) 3033087142 (MF 1:30pm to 5:00pm UK Time)
Email: ONlit@hibbertco.com